Influenza vaccine

Kathryn Dzintars, Pharm.D., BCPS

VACCINE TYPE

Four major types are available in the U.S.:

  • Inactivated influenza vaccine, Trivalent (IIV3)
    • Available as a high-dose vaccine.
  • Recombinant influenza vaccine, Trivalent (RIV3)
  • Live attenuated influenza vaccine, Trivalent (LAIV3)
  • mRNA influenza vaccine, Trivalent
    • FDA-approved August 2026; not yet incorporated into CDC’s September 2026 interim influenza vaccine guidance.
  • All 2026-27 Influenza season vaccines will be trivalent vaccines, as the influenza B/Yamagata lineage is no longer circulating.

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